package com.mapproject.industrymap.utils;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
import org.springframework.util.Base64Utils;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

@Component
public class UnZipFile {
    @Value("${file.uploadFolder}")
    private String uploadFolder;
    @Value("${file.projectFileDir}")
    private String projectFileDir;
    public List<String> batchadd(String getfiledir) {
        /*
         *创建临时文件夹
         * 解压文件
         */
        String path = uploadFolder+projectFileDir+"ziptemp/";
        File dir = new File(path);
        dir.mkdirs();
        List<String> list = new ArrayList<>();
        try {
            String newFilePath = uploadFolder+getfiledir;
            File zipFile = new File(newFilePath);
            list = unZipFiles(zipFile, path);//解压文件，获取文件路径
        } catch (Exception e) {
            e.printStackTrace();

        }
        //程序结束时，删除临时文件
        //deleteFiles(filePath);//删除压缩包文件夹
        //deleteFiles(path);//删除解压文件夹**

        return list;
    }

    /**
     * zip解压
     *
     * @param srcFile     zip源文件
     * @param destDirPath 解压后的目标文件夹
     * @return list 解压文件的路径合集
     * @throws RuntimeException 解压失败会抛出运行时异常
     */
    public static List<String> unZipFiles(File srcFile, String destDirPath) throws RuntimeException {
        List<String> list = new ArrayList<>();
        long start = System.currentTimeMillis();
        // 判断源文件是否存在
        if (!srcFile.exists()) {
            throw new RuntimeException(srcFile.getPath() + "所指文件不存在");
        }
        // 开始解压
        ZipFile zipFile = null;
        try {
            zipFile = new ZipFile(srcFile);
            Enumeration<?> entries = zipFile.getEntries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) entries.nextElement();

                // 如果是文件夹，就创建个文件夹
                if (entry.isDirectory()) {
                    String dirPath = destDirPath + entry.getName();
                    File dir = new File(dirPath);
                    dir.mkdirs();
                } else {
                    // 如果是文件，就先创建一个文件，然后用io流把内容copy过去
                    File targetFile = new File(destDirPath + entry.getName());
                    // 保证这个文件的父文件夹必须要存在
                    list.add(destDirPath + entry.getName());
                    if (!targetFile.getParentFile().exists()) {

                    }
                    targetFile.createNewFile();
                    // 将压缩文件内容写入到这个文件中
                    InputStream is = zipFile.getInputStream(entry);
                    FileOutputStream fos = new FileOutputStream(targetFile);
                    int len;
                    byte[] buf = new byte[1024];
                    while ((len = is.read(buf)) != -1) {
                        fos.write(buf, 0, len);
                    }
                    // 关流顺序，先打开的后关闭
                    fos.close();
                    is.close();
                }
            }
            long end = System.currentTimeMillis();

        } catch (Exception e) {
            throw new RuntimeException("unzip error from ZipUtils", e);
        } finally {
            if (zipFile != null) {
                try {
                    zipFile.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return list;
    }

    /**
     * @param filePath 临时文件的删除
     *                 删除文件夹里面子目录
     *                 再删除文件夹
     */
    public void deleteFiles(String filePath) {
        File file = new File(filePath);
        if ((!file.exists()) || (!file.isDirectory())) {
           // log.info("file not exist");
            return;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (filePath.endsWith(File.separator)) {
                temp = new File(filePath + tempList[i]);
            } else {
                temp = new File(filePath + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                this.deleteFiles(filePath + "\\" + tempList[i]);
            }
        }
        // 空文件的删除
        file.delete();
    }

}
